Instructions: To activate the lights you must follow 2 steps: (Step 1) Turn switch to "ON" position. The switch is located inside the seam. (Step 2): Press the ON/OFF button. Warm tips: Please dont worry about the lights and return policy, if your hats dont work, you can change the batteries Comfortable Material: LED Light-up Christmas knitted beanie hat is made from soft acrylic fabric, personality and keep you warm. One size fits all people, boys girls men and women Beautiful & Fashion: The battery box and the switch are hidden on the edge of the Santa Claus hat, and the whole hat looks very tidy, this beanie is designed for you, best gift for the holiday, festival, party, Christmas, birthday, Neon Party Colorful LED Hat: With the 10 colorful LED, light up your celebration, perfect decoration for Christmas. Add some fun to your holiday Ugly Xmas Sweater Flair: Pair this merry accessory with your ugliest Christmas sweater for a holly jolly contest-winning look. This also a fun photo booth prop & giveaway